FLM CB-38FTR Professional 1.5" Ball Head with Friction / Tilt, 55.11 lbs Load Capacity FLM CB-38FTR Professional 1.5" Ball Head with Friction / Tilt - Adapter Plate - FLM 10 Year Warranty Ball diameter: 38mm / 1.5" Camera socket: 1/4" / 0.64cm & 3/8" 0.95cm Bottom thread: 3/8"/ 0.95cm Load Capacity: 25 kg / 55.11 lbs